Supporting device for brush-holders.



UNIT ED STATES JOHN P. MALLETT, OF MADISCK, \V'ISCONSIN, ASSIGNOR'TO-IflQRTlIERN ELECTRICAL MANUFACTURING COMPANY, SAME PEACE.

SUPPORTING DEVICE FOR BRUSH-HOLDERS.

srncxmcanon torming part of Letters Patent No. 681,421, dated August 27, 1901.

Application filed May 10, 1901.

, zen of the United States, residing at Madison,

in the county of Dane and State of Wisconsin, have invented a certain new and useful Imrovement inSupporting Devices for Brush- Iolders, of which the following is a. specification.

My invention relates to supporting devices for brush-holders for dynamo -electric machines, and has for its object to provide a new and improved supporting device of this de-.

scription.

My invention is illustrated in the accompanying drawings, wherein- Figure l is a view of a machine with parts omitted, showing the brush-holder support in position- Fig. 2 is a view showing the brushholder support detached from the machine. Fig. 3 is a section on line 3 3, Fig. 1. Fig. 4 is a similar section on line 4 4, Fig. 1. 5 is a view showing the bearing of the controlling hand-wheel.

Like letters refer to like parts throughout the several figures.

As herein illustrated the brush-holder support is mounted directly within the edge of the field-magnet frame.

In carrying out my invention I provide a brush-holder support or ring A, which ex.- tends around the armature-shaft, the brushholders being connected therewith in any desired manner. This ring or support fits into a recess B in the field-magnet frame. Some suitable means is provided for adjusting the brush-holder support, so as to adjust the brushes to their proper position with relation ."to the commutator.' In the construct ion illustrated the brush-holder support is provided with a rack C, which is engaged by a pinion D on the short spindle or shaft E, mounted in the held-frame and having the controlling hand-wheel i by means of which it may be operated. In inserting the pinion and shaft in position the field-frame is bored or recessed and the shaft is provided with a bearing G, which fits into this recess and which is fastened in position in any desired manner, as by means of the screws it. it will thus be seen that the brush-support may be rotated togive it a proper adjustment by turning Fig.

Sari a1 No. 5 9 .5 5 9. (Ho model.)

the hand-wheel, the pinion D engaging the rack C,- as shown in Fig.

The recessed face of the field-magnet frame is provided with the groove 1, into which fit the ends of a series of set-screws J, passing through thebrush-holder support. When it is desired to adj ust the-brush-holder support, these set-screws are loosened, and when the parts are properly adjusted they are again tightened, so as to hold the parts in this adjusted position. These set-screws prevent any lateral displacement of the blllSllrllOldGl' support while being adjusted and rigidly hold it in position after adjustment is made.v

This construction greatly facilitates the mounting of the brush-holder support and provides a compact arrangement, giving a perfect adjustment when desired and permitting the locking of the parts after the adjustment is completed. 13y forming the fieldmagnet frame with a recess the construction is eheapened and the strength, durability, and effectiveness increased. v holders are connected to the brush-holder support by means of the bolts K and maybe of any desired construction. It will also be seen that this construction permits the use of any desired number of brushes and their proper distribution about the commutator.

l have described in detail a particular eonstruct-ion to make my invention clear; but

The brushit is of course evident that the parts may be the field-frame and en a in said brush D D D holder support so as to vary its position, and means for locking the support in its adjusted position.

E3. The combination with the field-magnet frame of a dynamoelectric machine, having a recess extending therearound, of a brushholdcr-supporting ring litting into said recess,

a rat-l; extending along a portion of the pe riphery of said supporting-ring, and a shaft mounted in the field-frame end carrying a 'pinion engaging said rack, so that the brushhoiding ring may be adjusted.

3. The combination with the. field-n mgnet frame of a. dynamo-electric inaoiiine, lmving a reeessextending therearound,-of a brushholder-s'upporting ring fitting into said recess, a rack extending along a, portionof the periphery of said supporting ring, a shaft mounted in the fieldJi-ame and carrying a pinion engaging said rack, sot'hat the brushholding ring may be adjusted, a continuous groove on the'recessed face of the field-frame, and one or we set-screws projecting through the brush-h'didin'g; ring into said groove.

4. Abrush-hoidingdevice for dynamo-electrio machines, comprisingfe brush-supporting ring extending around tiie commutator and fitting into at recess in the field-frzune, a rack extending along a portion of the periphery oi said brusivsnpporting ring, a pinion mounted in the recessed face of the fieldframe, a shaft to which said pinion is conneoted mounted in a, bearing reinovably at taohed t0 the fieldonagnet frame, whereby the brush-supporting ring may be adj net-ed to any desired position. 

